Claims
- 1. A method of producing a refinish primer system comprising:
- preparing a refinish primer composition comprising an organic solvent based dispersion having a solids content in the range from about 45 to 70% by weight, wherein said solids comprise:
- from about 10 to about 50% by weight of crosslinked acrylic polymer microparticles having a diameter of 0.1 to 10 microns which are insoluble in the organic solvent and are stabilized in the solvent system by steric barriers, said steric barriers containing at least two segments, one segment being soluble in the organic solvent and the other segment being substantially insoluble therein;
- from about 30 to about 60% by weight of an oxidatively-curable resin; and
- from about 15 to about 40% by weight of one or more additional ingredients selected from the group consisting of corrosion inhibitors, inert fillers, pigments, surface builders and mixtures thereof;
- applying said refinish primer composition to a bare substrate surface to form a protective layer; and
- applying on said protective layer a primer surface composition comprising an organic solvent, an oxidatively-curable or plastic resin and an inert filler to form a refinish primer system.
- 2. The method of producing a refinish primer systen according to claim 1 wherein said one or more additional ingredients comprises a corrosion inhibitor.
- 3. The method of producing a refinish primer systen according to claim 1 wherein said one or more additional ingredients comprises an inert filler, a colored pigment or a mixture thereof.
- 4. The method of producing a refinish primer systen according to claim 1 wherein the dispersion stabilizing polymers are chemically bound to the microparticles.
- 5. The method of producing a refinish primer systen according to claim 1 wherein the oxidatively-curable resin comprises an alkyd resin, an oil-modified acrylic resin, an epoxy-unsaturated fatty acid ester resin, or an addition or condensation resin with pendant olefinic groups.
- 6. The method of producing a refinish primer systen according to claim 5 wherein the addition or condensation resin is a polyester, polyurethane, polyamide, polylactone, polycarbonate or polyolefin.
- 7. The method of producing a refinish primer systen according to claim 2 wherein the corrosion inhibitor is a zinc salt.
- 8. The method of producing a refinish primer systen according to claim 7 wherein the zinc salt is zinc phosphate.
- 9. The method of producing a refinish primer systen according to claim 1 wherein the organic solvent system has non-polar solvating power.
- 10. The method of producing a refinish primer systen according to claim 9 wherein the solvent system comprises an aromatic hydrocarbon, an aliphatic ketone, an aliphatic ester or a mixture thereof.
- 11. The method of producing a refinish primer systen according to claim 1 wherein the microparticles are polymers of methyl acrylate or methacrylate, acrylic or methacrylic acid and glycidyl acrylate or methacrylate with surrounding steric barriers of the adduct of self-condensed 12-hydroxystearic acid and glycidyl acrylate or methacrylate, which adduct is copolymerized with methyl acrylate or methacrylate and acrylic or methacrylic acid.
- 12. The method of producing a refinish primer systen according to claim 1 wherein said refinish primer composition comprises silica, bentonite or kaoline clay, zeolites, talcs, inorganic carbonate or silicate or mixtures thereof.
- 13. The method of producing a refinish primer system according to claim 1 wherein the solids content of said organic solvent based dispersion is 50 to 60 percent by weight.
- 14. The method of producing a refinish primer system according to claim 1 wherein said solids comprise from about 20 to about 40% by weight of the crosslinked acrylic polymer microparticles.
- 15. The method of producing a refinish primer system according to claim 1 wherein said solids comprise from about 40 to about 50% by weight of the oxidatively-curable resin.
- 16. The method of producing a refinish primer system according to claim 1 wherein said solids comprise from about 20 to about 35% by weight of one or more ingredients selected from the group consisting of corrosion inhibitors, inert fillers, pigments, surface builders and mixtures thereof.
- 17. The method of producing a refinish primer system according to claim 1 wherein said solids comprise:
- from about 20 to about 40% by weight of the crosslinked acrylic polymer microparticles;
- from about 40 to about 50% by weight of the oxidatively-curable resin; and
- from about 20 to about 35% by weight of one or more ingredients selected from the group consisting of corrosion inhibits, inert fillers, pigments, surface builders and mixtures thereof.
Parent Case Info
This application is a continuation of application Ser. No. 08/042,899, filed on Apr. 5, 1993, which is a continuation of Ser. No. 07/799,928, filed Nov. 26, 1991, now abandoned; which is a continuation of Ser. No. 07/474,260, filed Feb. 5, 1990, now abandoned; which is a continuation of Ser. No. 07/168,453, filed Mar. 15, 1988, now abandoned.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
3876603 |
Malshlouf |
Apr 1975 |
|
4403003 |
Backhouse |
Sep 1983 |
|
4791152 |
Adeney et al. |
Dec 1988 |
|
Continuations (4)
|
Number |
Date |
Country |
Parent |
042899 |
Apr 1993 |
|
Parent |
799928 |
Nov 1991 |
|
Parent |
474260 |
Feb 1990 |
|
Parent |
168453 |
Mar 1988 |
|